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Discontinued Operations - Assets and Liabilities of Discontinued Operations on Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disposal Group Including Discontinued Operation Balance Sheet Disclosures [Abstract]    
Receivables, net $ 382 $ 148
Total current assets 382 148
Other assets, net   483
Deferred income tax assets, net 1,585 5,622
Total assets of discontinued operations 1,967 6,253
Accounts payable and accrued expenses 185 76
Remaining lease obligations 5,516 8,143
Total current liabilities 5,701 8,219
Remaining lease obligations 785 6,331
Other   91
Total liabilities of discontinued operations $ 6,486 $ 14,641